3-Fluorobenzaldehyde → toluene-4-sulfonic acid 3-[3-[(3-fluoro-phenyl)-hydroxy-methyl]-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl ester

HRID 603054Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 603054
I[C:2]1[C:10]2[C:5](=[N:6][CH:7]=[C:8]([C:11]3[CH:12]=[C:13]([O:17][S:18]([C:21]4[CH:26]=[CH:25][C:24]([CH3:27])=[CH:23][CH:22]=4)(=[O:20])=[O:19])[CH:14]=[CH:15][CH:16]=3)[CH:9]=2)[N:4]([S:28]([C:31]2[CH:36]=[CH:35][C:34]([CH3:37])=[CH:33][CH:32]=2)(=[O:30])=[O:29])[CH:3]=1.[Li]C(C)(C)C.[F:43][C:44]1[CH:45]=[C:46]([CH:49]=[CH:50][CH:51]=1)[CH:47]=[O:48]>C1COCC1.CCCCC>[F:43][C:44]1[CH:45]=[C:46]([CH:47]([OH:48])[C:2]2[C:10]3[C:5](=[N:6][CH:7]=[C:8]([C:11]4[CH:12]=[C:13]([O:17][S:18]([C:21]5[CH:26]=[CH:25][C:24]([CH3:27])=[CH:23][CH:22]=5)(=[O:20])=[O:19])[CH:14]=[CH:15][CH:16]=4)[CH:9]=3)[N:4]([S:28]([C:31]3[CH:36]=[CH:35][C:34]([CH3:37])=[CH:33][CH:32]=3)(=[O:30])=[O:29])[CH:3]=2)[CH:49]=[CH:50][CH:51]=1

Komponenten

6

Edukt 3

HCID 680093-FluorobenzaldehydeHCID 59699703toluene-4-sulfonic acid 3-[3-iodo-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl esterHCID 178418306HCID 178418306, Verbindung

Produkt 1

HCID 86602995toluene-4-sulfonic acid 3-[3-[(3-fluoro-phenyl)-hydroxy-methyl]-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl esterAusbeute 52,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8003PentaneLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
10 °C

Versuchsvorschrift

To a solution of toluene-4-sulfonic acid 3-[3-iodo-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl ester (50 mg, 0.077 mmol, prepared as exemplified in method 6) in THF (2 mL) at −90° C. under nitrogen atmosphere was added, a solution of tBuLi in pentane (1.7 M, 90 uL) dropwise. After stirring for 5 min, 3-fluoro-benzaldehyde (40 uL, 0.38 mmol) was added and the reaction mixture was slowly warmed up to 10° C. over 2 h, then quenched with a saturated solution of ammonium chloride and extracted with EtOAc three times. The extracts were combined and adsorbed on silica gel. Purification on silica gel with a gradient of MeOH/CH2Cl2 afforded 26 mg of toluene-4-sulfonic acid 3-[3-[(3-fluoro-phenyl)-hydroxy-methyl]-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl ester. The material was dissolved in dichloromethane (0.3 mL) under nitrogen atmosphere. Triethylsilane (24 uL, 0.149 mmol) was added, followed by boron trifluoride etherate (7 uL, 0.149 mmol) dropwise. After stirring for 15 h, the reaction was quenched with a saturated solution of sodium bicarbonate and extracted with dichloromethane three times. The extracts were combined and concentrated under vacuum. The crude was treated with 2 mL of EtOH and 2 mL of aqueous KOH (50 wt %). The reaction mixture was stirred at 70° C. for 1 h. The mixture was acidified to pH 4 with 1N aqueous HCl, and extracted with EtOAc three times. The extracts were combined and adsorbed on silica gel. Purification on silica gel with a gradient of MeOH/CH2Cl2 afforded 3-[3-(3-fluoro-benzyl)-HCl-pyrrolo[2,3-b]pyridine-5-yl]-phenol as a beige solid (8 mg, 66% yield). 1H NMR (500 MHz, DMSO-d6) δ 4.11 (s, 3H), 6.74 (dd, J=2.5, 8.5 Hz, 1H), 6.97 (dt, J=2.0, 8.5 Hz, 1H), 7.00 (s, 1H), 7.05 (d, J=8.0 Hz, 1H), 7.13 (d, J=10.5 Hz, 1H), 7.17 (d, J=8.0 Hz, 1H), 7.25 (t, J=7.5 Hz, 1H), 7.30 (q, J=8.0 Hz, 1H), 7.40 (d, J=2.5 Hz, 1H), 8.07 (d, J=2.0 Hz, 1H), 8.42 (d, J=2.0 Hz, 1H), 9.56 (broad s, 1H), 11.6 (s, 1H). MS: m/z 319 (M+H+).

Aufarbeitung

  1. customquenched with a saturated solution of ammonium chloride
  2. extractionextracted with EtOAc three times
  3. customPurification on silica gel with a gradient of MeOH/CH2Cl2

Quellen und Nachweise

ORD-Eintrag
ord-0c60c5918a904360bbba51c7748a660d
Quelldatensatz
uspto-grants-2011_03
Patentnummer
US07906648B2

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